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From the TallBloke blog...It is my pleasure to publish this guest post by Tim Cullen, an independent solar system researcher. His previous post here didn’t get the attention it deserved due to the other events occurring around the same time, so take a look at that too. Tim Cullen has generously given me permission to add a link to a full pdf copy of this article. Please disseminate it widely.

The problem with Total Solar Irradiance [TSI] is two fold:

Firstly: Scientists aren’t Climatologists.

Secondly: Climatologists aren’t Scientists.

Let me explain.

Scientists have been using satellites since 1979 to measure Total Solar Irradiance.

The current generation of measurements come from the state-of-the-art satellite mission called the Solar Radiation and Climate Experiment [SORCE]:

The Solar Radiation and Climate Experiment (SORCE) is a NASA-sponsored satellite mission that provides state-of-the-art measurements of incoming X-ray, ultraviolet, visible, near-infrared, and total solar radiation.

SORCE measures the Sun’s output with the use of state-of-the-art radiometers, spectrometers, photodiodes, detectors, and bolometers engineered into instruments mounted on a satellite observatory.

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The SORCE satellite orbits around the Earth accumulating solar data.

The SORCE mission web site also clearly states that the scientists think they are providing “precise measurements of total solar irradiance”:

The SORCE spacecraft was launched on January 25, 2003 on a Pegasus XL launch vehicle to provide NASA’s Earth Science Enterprise (ESE) with precise measurements of solar radiation. It launched into a 645 km, 40 degree orbit and is operated by the Laboratory for Atmospheric and Space Physics (LASP) at the University of Colorado (CU) in Boulder, Colorado, USA.

It will continue the precise measurements of total solar irradiance (TSI) that began with the ERB instrument in 1979 and has continued to the present with the ACRIM series of measurements.

SORCE will also provide the measurements of the solar spectral irradiance from 1nm to 2000nm, accounting for 95% of the spectral contribution to TSI.

» How much "Man Made" CO2 Is In The Earth's Atmosphere?
I think ALL of the CO2 in the Earth's Atmosphere is from man.
I'm not sure how much "Man Made" CO2 is in the Earth's Atmosphere.
There is .04% CO2 in the Earth's Atmosphere and of that "Man" has added an extra 4% (1 part in 62,500)